    // 安装固定
    .step4 {
        height: 100%;
        position: relative;
        .step4-one {
            height: 100%;
            &>div {
                width: 90% !important;
                margin-left: 15px !important;
                margin-right: 15px !important;
            }
            &>div:nth-of-type(1) {
                position: relative;
                margin-left: -5px;
                span {
                    display: inline-block;
                    width: 3px;
                    height: 13px;
                    background: #00b5ff;
                    position: absolute;
                    top: 50%;
                    transform: translate(-50%, -50%);
                }
                label {
                    margin-left: 5px;
                    font-size: 15px;
                }
            }
            &>div:nth-of-type(2) {
                position: absolute;
                top: 50%;
                width: 100%;
                text-align: center;
                transform: translate(0, -50%);
                span {
                    display: inline-block;
                    position: relative;
                    width: 100px;
                    height: 100px;
                    border: 7px solid #c8f0ff;
                    border-radius: 50%;
                    img {
                        position: absolute;
                        top: 50%;
                        left: 50%;
                        width: 50%;
                        transform: translate(-50%, -50%);
                    }
                }
                &>img {
                    width: 150px;
                }
            }
            p {
                margin: 0;
                font-size: 10px;
            }
            p:nth-of-type(1) {
                margin: 10px 0 5px 0;
            }
        }
    }
    
    button {
        width: 90%;
        padding: 15px;
        position: absolute;
        bottom: 20px;
        border-radius: 5px;
        background: #00b5ff;
        color: #fff;
        left: 5%;
        outline: none;
    }